Why wont my TI-nspire CX CAS turn on?

I have not had it for long, and I only used it for one semester at school, and I never dropped it. I tried pushing the reset button on the back, I tried holding down the ON/Off button to see if it was just in sleep mode, I have purchased a new battery to see if that was the problem, and I purchased a new charger,... show more I have not had it for long, and I only used it for one semester at school, and I never dropped it.

I tried pushing the reset button on the back, I tried holding down the ON/Off button to see if it was just in sleep mode, I have purchased a new battery to see if that was the problem, and I purchased a new charger, just in case the one that it came with was just defective.

Help!!!!!!!! Please
Update: The screen is just black. There's no white or static on the screen.
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